﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Text.RegularExpressions;

namespace WutiWTO.Common
{
    public class Utility
    {
        public static int ConvertIntFromEnum(Enum type)
        {
            return Convert.ToInt32(type);
        }

        public static int ConvertIntFromString(string oldValue)
        {
            int general = -1;
            Int32.TryParse(oldValue, out general);
            return general;
        }
        public static Dictionary<string, string> GetXML(string xmlFile)
        {
            Dictionary<string, string> data = new Dictionary<string, string>();
            XmlDocument doc = new XmlDocument();
            doc.Load(xmlFile);
            XmlNodeList list = doc.SelectNodes(@"//Root//Item");
            foreach (XmlNode node in list)
            {
                data.Add(node.Attributes["id"].Value, node.Attributes["value"].Value);
            }
            return data;
        }
        public static Dictionary<string, string> GetTOPNav(string xmlFile)
        {
            Dictionary<string, string> data = new Dictionary<string, string>();
            XmlDocument doc = new XmlDocument();
            doc.Load(xmlFile);
            XmlNodeList list = doc.SelectNodes(@"//Root//Item");
            foreach (XmlNode node in list)
            {
                if (node.Attributes["visible"].Value == "1")
                {
                    data.Add(node.Attributes["id"].Value, node.Attributes["value"].Value);
                }
            }
            return data;
        }

        public static string GetDescByIDFromXML(string xmlFile,string id)
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(xmlFile);
            XmlNode node = doc.SelectSingleNode(string.Format(@"//Root//Item[@id={0}]", id));
            if (node != null)
            {
                return node.Attributes["value"].Value;
            }
            return "";
        }

        public static string CutStringByLength(string strORG, int length)
        {
            int intLength = strORG.Length;
            if (intLength <= length)
            {
                return strORG;
            }
            else
            {
                return strORG.Substring(0, length-1) + "..."; 
            }
        }

        public static void MakeThumbnail(string originalImagePath, string thumbnailPath, ThumbType thumbType, int width, int height)
        {
            System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);

            int towidth = width;
            int toheight = height;

            int x = 0;
            int y = 0;
            int ow = originalImage.Width;
            int oh = originalImage.Height;

            switch (thumbType)
            {
                case ThumbType.HW:
                    break;
                case ThumbType.W:
                    toheight = originalImage.Height * width / originalImage.Width;
                    break;
                case ThumbType.H:
                    towidth = originalImage.Width * height / originalImage.Height;
                    break;
                case ThumbType.CUT:
                    if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
                    {
                        oh = originalImage.Height;
                        ow = originalImage.Height * towidth / toheight;
                        y = 0;
                        x = (originalImage.Width - ow) / 2;
                    }
                    else
                    {
                        ow = originalImage.Width;
                        oh = originalImage.Width * height / towidth;
                        x = 0;
                        y = (originalImage.Height - oh) / 2;
                    }
                    break;
                default:
                    break;
            }

            //新建一个bmp图片 
            System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);

            //新建一个画板 
            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);

            //设置高质量插值法 
            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

            //设置高质量,低速度呈现平滑程度 
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

            //清空画布并以透明背景色填充 
            g.Clear(System.Drawing.Color.Transparent);

            //在指定位置并且按指定大小绘制原图片的指定部分 
            g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight),
                    new System.Drawing.Rectangle(x, y, ow, oh),
                    System.Drawing.GraphicsUnit.Pixel);

            try
            {
                //以jpg格式保存缩略图 
                bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
            }
            catch (System.Exception e)
            {
                throw e;
            }
            finally
            {
                originalImage.Dispose();
                bitmap.Dispose();
                g.Dispose();
            }
        }
        public enum ThumbType
        {
            /// <summary>
            /// 指定高宽缩放（可能变形）  
            /// </summary>
            HW,
            /// <summary>
            /// 指定宽，高按比例   
            /// </summary>
            H,
            /// <summary>
            /// 指定高，宽按比例 
            /// </summary>
            W,
            /// <summary>
            /// 指定高宽裁减（不变形）  
            /// </summary>
            CUT
        }

        private static string StripHT(string strHtml)
        {
            Regex regex = new Regex("<.+?>", RegexOptions.IgnoreCase);
            string strOutput = regex.Replace(strHtml, "");
            return strOutput;
        }

        public static string splitstring(string str, int leaveCount, bool needDit)
        {
            str = StripHT(str);
            if (str.Length <= leaveCount)
            {
                return str;
            }
            else
            {
                str = str.Remove(leaveCount - 3);
                if (needDit == true)
                {
                    return str + "...";
                }
                else
                {
                    return str;
                }
            }
        }
    }
}
